1. Lignin is found mainly in :
A) Leaf lamina
B) Middle lamella
C) Pedicle
D) Leaf veins
2. Tilth is related to :
A) Shape of soil aggregates
B) Size distribution of soil aggregates
C) Arrangement of soil aggregates
D) All of the above
3. Mallika variety of mango is a cross between :
A) Neelum × Dashehari
B) Chaunsa × Dashehari
C) Neelum × Alphonso
D) Alphonso × Langra
4. In which one of the following distribution, standard deviation is equal to root of the mean?
A) Normal distribution
B) Poisson distribution
C) Binomial distribution
D) Partial distribution
5. First manmade cereal was Triticale which is a cross between :
A) Wheat × Rye
B) Wheat × Rice
C) Rice × Rye
D) Maize × Wheat
6. Dead heart and white ear disease is related to the crop :
A) Wheat
B) Maize
C) Barley
D) Rice
7. B. P. Pal is a famous variety of :
A) Rose
B) Marigold
C) Brinjal
D) Chrysanthemum
8. Permanent wilting point is the minimal point of soil moisture the plant requires not to wilt. It is generally occurred at :
A) 5 bar
B) 15 bar
C) 10 bar
D) 50 bar
9. Coefficient of correlation ranges between :
A) 0 to 1
B) 0 to ∞
C) 1 to 10
D) −1 to +1
10. The Arka series of varieties are released from :
A) IARI, New Delhi
B) NBPGR, New Delhi
C) IIHR, Bangalore
D) NDRI, Karnal
11. The second crop sown before harvesting of first crop is termed as :
A) Intercropping
B) Mixed cropping
C) Relay cropping
D) Lay farming
12. Symbiotic bacteria first infects :
A) Root hair
B) Apical meristem
C) Shoot system
D) Stem development
13. Trichoderma viridis is a type of :
A) Biofertilizer
B) Biocontrol agent
C) Biosynthesizer
D) Nematocide
14. The leading onion producing state of India is :
A) Uttar Pradesh
B) Madhya Pradesh
C) Gujarat
D) Maharashtra
15. Nodule formation in legumes is inhibited by the bacterium :
A) Azolla
B) Azotobacter
C) Rhizobium
D) Clostridium
16. The theory of Centres of Origin of cultivated plants was proposed by :
A) Charles Darwin
B) N. I. Vavilov
C) W. Johannsen
D) Bateson
17. The hairs on the stem of the plants are :
A) Unicellular
B) Multicellular
C) Acellular
D) None of the above
18. Azotobacter is an asymbiotic aerobic bacteria which helps in nitrogen :
A) Reduction
B) Fixation
C) Assimilation
D) Absorption
19. Khaira disease in rice is caused due to the deficiency of :
A) Ca
B) Mn
C) Zn
D) Mo
20. Respiration in prokaryotes takes place in :
A) Mesosomes
B) Cell membrane
C) Peroxisomes
D) None of the above
21. Which one of the following was the first agricultural university to be established in India?
A) GBPUAT, Pantnagar
B) MPKV, Rahuri
C) JNKVV, Jabalpur
D) HAU, Hisar
22. In 1958, Jacob and Wollman discovered :
A) In-vitro synthesis of DNA
B) In-vitro synthesis of RNA
C) DNA is the genetic material in E. coli
D) E. coli linkage group is circular
23. Crop farming and milk production is an example of :
A) Cooperative enterprise
B) Competitive enterprise
C) Complementary enterprise
D) Supplementary enterprise
24. Gypsum is used for the reclamation of :
A) Alkali soils
B) Sodic soils
C) Acidic soils
D) Water-logged soils
25. Gurgaon attempt (first rural development programme) was started in 1920 by :
A) Dr. Spencer Hatch
B) F. L. Brayne
C) R. N. Tagore
D) Albert Mayor
26. Optimum temperature for the growth of thermophilic bacteria is :
A) 20–25°C
B) 30–50°C
C) 50–70°C
D) 70–93°C
27. Which one of the following is not a sexual method of reproduction in bacteria?
A) Conjugation
B) Transduction
C) Binary fission
D) Transformation
28. Select the wrong pair :
A) NBGR – Karnal
B) CIF – Mumbai
C) IVRI – Izatnagar
D) NDRI – Karnal
29. Photorespiration in C₄ plants is :
A) Normal
B) Below normal
C) Above normal
D) Negligible
30. Which one of the following is the monophagous insect pest?
A) Locust
B) Midgefly
C) Yellow stem borer
D) Red hairy caterpillar
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